Refrigerating apparatus



' L. A PHILIPP REFRIGERATING APPARATUS Nov. 24; .1942. r 2,363,138

f Qriginal Filed Au 23,

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. REFRIGERAT-ING APPARATUS OriginaLF'iled Aug. 23, 1940 -3 Sheets-Sheet 2 flTTOEIYEY Nov. 24, 1942. L. A. PHlLlPP REFRIGERATING APPARATUS 3 Sheets-Sheet 5 Original Filed Aug. 25, 1940 I w o rlL u aaaaaeesaaaas assi mm'ammwm axummmmw INVENTOR. Lamas/ms 4. P/(ILIF'P BY M4,

y a n a T T 0 Patented Nov. 24, 1942 REFRIGEKATING APPARATUS Lawrence A. Philipp, Detroit, Mich, assignor to Y Nalh-Kelvinator- Corporation, Detroit, Mich,

a corporation of Maryland Original application sum 23, 1940, Serial No. 353,924. Divided and imapplication uan,-

1941, Serial No. 403,354

9 Claims. (01. 62-10:

This invention relates to refrigerating apparatus, and more particularly to household refrigerators. V

The present application is a'division of my copending application Serial No. 353,924 filed August 23, 1940, for Refrigerating apparatus. Y,

One of the objest of my invention is to provide an improved arrangement for draining the drip water from refrigerant evaporaiors to the exterior of refrigerator cabinets.

Further objects and advantages of the present. invention will be apparent from the following as, scription, reference being had to theaccompanying drawings, wherein a preferred form of the present invention isclearlyshown. 4'

Inthedrawingsz. Fig. 1 is a frontview in elevationv and partly broken away showing a. refrigerator embodying V 7 features of my invention; Hg.2isaviewtakenalongtheline2-.-2 :20

Fig. 3 is a along-line 3-4 of Fig. 1;

Fig.4is a view of a modified form of casing which is positioned within the food storage compartment for providing an ice freezing zone.

Referring to the drawings, the numeral. 340

designates in general a cabinet having inner metallic liner 342 and an outer-metallic casing 344. The inner metallic liner 342 forms walls of food storage compartment 340. Within the food storage compartment 340 is placed a sheet metal casing 030. which is secured to'top wall of the liner 342 by bolts (not shown) and 'to the rear wall of the liner by bolts (not shown). Inter- 3,5

posed between the casing 300 and theliner is provided gasket material 350 for sealing the terminating edges of the casing!" to the top and rear walls of the liner 342 so thatcirculating air within the food storage compartment is sealed from 40 the interior of the casing 300- and serves toform an ice freezing zone 3". The front of th zone 000 is closed by .a hinged door 062 whichis of double wall structure and carries a gasket 364 which engages with the front-wall or the casing III to seal the open front of the casing so that circulating air within the food storage compartment cannot enter the ice freezing zone through the open front-of the casing 350.

, In Fig. 4 I have shown a modified form of casing I04, which is preferably constructed of plastic or glass, and offers'some insulation to the flow of heat through the walls thereof.

Also, within the food storage compartment, I

have provided a drip receiver 390 which i the through the drain pipe 0.

heat. insulating material 420.

form of a shallow pan and is carried by the cos-- ing 350 by supports 392. The drip receiver has an upturned edge 394 at its forward end and a downturned edge 396 at the rear thereof. The

drip receiver 390 is positioned so as to collect drip water fromthe casing 350 which may run down its exterior surfaces, and also for collecting drip water which may run through opening :398 formed in the bottomwall of the casing 350. The downturned edge 392 of'the drip receiver extends over a protuberance 400 formed in the rear wall of the.

liner sothat the drip water passing from the re-- ceiver 390 will contact the protuberance and then run down the rear wall of the liner to the bottom 7 wall thereof. Withinthe bottom wall of the liner I have formed a recess 404 which has upturned bent portion 406 and an outlet 400-formed therein. Below the outlet 400 is'a drain pipe 4". Above the upturned portion 400 is inverted cup 2 having slots 4 so that the drip water may run under the cup and thus form a trap thereunder so that air from outside the cabinet may not enter the interior of the refrigerator through thepipe H0 and outlet 400. Also, the cup I prevents possibility of food articles passing Below: the food storage compartment there is provided a compartment 420. Within the machine compartment there is provided a vegetable bin 4:: which has an inclined rear wall 424 to v v which is secured sound insulatingmaterial and While such material as showngherein is shown as cork insulation, any suitable sound absorbing. and heat insulating fibrous material, Rock Woolf or the like, may be used, Upon the forward edge of the inclined wall 424, I have provided a removable drip pan 420 which is carried by rivets 430 and the pan is readily removable therefrom, by simply sliding upwardly on the inclined surface 424 .until an enlarged slot 434 surrounds the head of the rivet 430 and then the removable receptacle 428 may be moved forward slightly to clear the head ofthe rivet and then lifted upwardly to be removed from the vegetable bin. Thedrip receptacle 428'ispositioned below the drain pipe 0 to receive the drip water from the pipe 4".-

The vegetable bin is carried by-a tiltable door 430 which closes the front end ofthe machine compartment.

outer wall 442 and an inner wall 444. These walls have on' their lower edges flanges which e;- tend toward each other and which carry rubber gasket material 446. The rubber gasket-ma The door 430 rests upon an L- shaped member 440 and the door includes an terial engages the L-shaped support and allows the upper part of the door to be tilted outwardly to gain access to the vegetable bin to place vegetables therein or to remove the drip receptacle as desired. Since the rear wall 424 of the vegetable the accumulator flows downwardly through verbin is insulated, the heat of condensation does not tend to evaporate water collected in the receptacle 428 and it is found necessary to periodically empty such receptacle.

Within the cabinet I have provided a refrigerating system, designated in general by the numeral'448. The system includes a condensing element 456 which includes a motor compressor unit 452 and condenser 454. The system also includes a refrigerant evaporating element 456 which includes refrigerated shelves 456 and pipe loops 466. 'At the outlet of the element 456 is a refrigerant accumulator 462. Liquid refrigerant is delivered from the condensing element to the evaporating element through a small diam:

eter or capillary tube 466, and vaporized refrigerant is returned from the accumulator 462 through vapor return conduit 466. The gaseous refrigerant returned through the conduit 466 to the compressor unit is compressed by it and delivered to the condenserelement to be liquifled and from'which it is delivered to the evaporating element under the control of the small diameter tube 466. Preferably, the small diameter tube 466 and vapor return conduit 468 are securely united together in heat exchange rela- 'tionship. The refrigerant entering the evaporating element first passes through one leg of the return bends 466 whence it flows through the lower refrigerated shelf to the second leg of the return bends 466 whence it passesthrough the upper refrigerated shelf and asmall quantity of vand the secondary condenser is such and the coating of Hydrolene" between the evaporator liquid is allowed to .enter the lower portion of spaced somewhat from the walls of the casing 656 so that it cools the walls of the casing 656 slightly so that whatever cooling effect it may have for the cooling of circulating air within the food storage compartment 348 takes place without the formation of, frostor ice on the exterior accumulated thereon.

which is condensed by the refrigerating efiect of tical leg M6 to the lowermost part of the evaporator 562 whence it flows upwardly in the evaporator and after it is vaporized it passes upwardly through a vertical leg (not shown) to the upper portion of the condenser 564. The accumulator and secondary refrigerating system isplaced within the insulation between the rear wall of the liner and the rear wall of the outer casing. Immediately below the accumulator I have provided a trough 566 which extends through an opening (not shown) in the rear wall of the liner. This permits ventilation between the insulation and the ice freezing evaporating element so that if there is any moisture in the air within the insulation it will be frozen out upon the accumulator or passed with the air to the ice making element'and frozen on-surfaces of the ice making element. When it is desired to defrost the refrigerant evaporating element 455, frost also melts from. the accumulator if any is This drip water would then flow through the trough 566 down to the bottom wall of the casing 356 and through the opening 666 in the bottom wall of the casing to the drip receiver 366 whenceit passes to the protuberance 466 formed in the rear wall of the liner and down to the bottom wall of the liner and through the drain 416. The secondary refrigerantevaporator 562 is secured to the rear wall of the liner, preferably by a coating of H37- drolene," however, any other bituminous cement may be used for that purpose. Preferably, the heatexchange relation between the accumulator 662 and the rear wall of. the liner is such, that the secondary refrigerant evaporator functions to cool the food storage compartment through the rear wall of the liner without the collection of frost upon the rear wall of the liner. If during operation of the secondary refrigerating system moisture collects on the rear wall of the liner 342 it will be conducted down the rear wall to the bottom wall of the liner and pass through the drain pipe 4" into the drip receptacle 426.

surfaces of the'casing 656. A switch 465 which includes thermal bulb 466 (see Fig. 2) secured to' member 414 is used for controlling the opera-' tion of the motor compressor unit in response to changes in temperature of member 414 as is well understoodin theart. i

Also, for cooling the food storage compartment,

I have provided a secondary refrigerating sys- '-tem, designated in general by the numeral 566 and includes an evaporating portion 562 secured to the rear wall of the liner only. The system also includes a condensing portion 564 which is secured to the rear wall of the liner at the'upper system 666, preferably by welding, the accumulator may be in good thermal contact with the condensing portion 564 and an accumulator is utilized for condensing evaporated refrigerant in the secondary system. Evaporated refrigerant Although only a preferred form of the invention has been illustrated, and that form described in detail, it will be apparent to those skilled in the art that various modifications may be made therein without departing from the spirit of the invention or from the scope of the appended claims:

I claim: i

1. Refrigerating apparatus comprising a cabinet'having a food storage compartment, a casing in said compartment, a refrigerant evaporating element in said casing, said casing having an opening in a wall thereof to permit drip water from said element to flow through. and a drip receiver carried by said casing and being arranged for conducting said drip water to a wall of said compartment, said drip receiver and said wall being so arranged with respect to each other that the drip water is discharged upon said wall.

2. Refrigerating apparatus comprising a cabprotuberance formed in a wall of said compartment.

3. Refrigerating apparatus comprising a cabinet having a food storage compartment, a casing in said compartment, a refrigerant evaporating element in said casing, said casing having an opening in a wall thereof to permit drip I water from said element to flow through, and

a drip'receiver' carried by said casing and being arranged for discharging said drip water upon said food storage compartment for discharge.

upon said inner wall.

v 5. Refrigerating apparatus comprising a cab inet having a liner, a refrigerant evaporator on one side of the liner, a refrigerant evaporator on the other side of the liner, said liner having an opening, a drip pan below one of said evaporators'and a trough below the other evaporator for conducting drip water through said opening and into said pan.

6 Refrigerating apparatus comprising a cabinet having a wall with aprotuberance formed thereon, heat absorbing means secured to said well, a refrigerant evaporator above said protuberance, means for conducting drip water from said evaporator to said protuberance, and a drain pipe below said wall.

7. Refrigerating apparatus comprising a cabinet having a liner arranged to form walls of a food storage compartment, a refrigerant evaporating element positioned in said compartment, means supported by said liner and positioned horizontally below said element and having provisions for collecting drip water from said element and conducting it to said liner, and means carried by the liner for supporting said means, said first means and said liner being so arranged with respect to each other that said drip water is discharged from said means on to said liner.

8. Refrigerating apparatus'comprising a cabinet having a liner arranged to form walls oi a food storage compartment, said liner having a protuberance, a refrigerant evaporator above said protuberance, a device positioned below said evaporator for collecting the drip water therefrom and having provisions for conducting it to said protuberance, and means carried by said liner and supporting said device in said position.-

9. Refrigerating apparatus comprising a cabinet having a liner arranged to form walls of afood storage compartment, said liner being provided with a protruding member, a refrigerant evaporator above said protruding member and means positioned below said evaporator for collecting the drip water therefrom and for conducting it to said protruding member, said'protruding member being arranged to receive and to direct the flowof drip water over the inner surface of said liner.

' LAWRENCE A. PHILIPP. 

